Diagnostic Instructions

DTC Descriptors

DTC B001A 01: Left Front/Driver Seat Belt Pretensioner Deployment Loop 2 Short to Battery

DTC B001A 02: Left Front/Driver Seat Belt Pretensioner Deployment Loop 2 Short to Ground

DTC B001A 04: Left Front/Driver Seat Belt Pretensioner Deployment Loop 2 Open Circuit

DTC B001A 0D: Left Front/Driver Seat Belt Pretensioner Deployment Loop 2 Resistance Above

DTC B001A 0E: Left Front/Driver Seat Belt Pretensioner Deployment Loop 2 Resistance Below

Diagnostic Fault Information

Circuit	Short to Ground	High Resistance	Open	Short to Voltage	Signal Performance
Seat Belt Pretensioner - LF/Driver High Circuit	B001A 02	B001A 0D	B001A 04	B001A 01	B001A 0E
Seat Belt Pretensioner - LF/Driver Low Circuit	B001A 02	B001A 0D	B001A 04	B001A 01	B001A 0E

Circuit/System Description

During a side or frontal crash of sufficient force the inflatable restraint sensing and diagnostic module (SDM) will allow current to flow through the deployment loop in order to deploy the seat belt pretensioner - LF/Driver. The SDM performs continuous diagnostic tests on the deployment loops to check for proper circuit continuity and for shorts to ground or voltage. A shorting bar is used within the seat belt pretensioner - LF/Driver connector which will short together both seat belt pretensioner - LF/Driver high and low circuits when the connector is disconnected. This will help to prevent unwanted deployment of the inflator module during servicing.

Conditions for Running the DTC

Ignition voltage is between 9-16 volts.

Conditions for Setting the DTC

B001A 01

The seat belt pretensioner - LF/Driver high and/or low circuit is short to voltage.

B001A 02

The seat belt pretensioner - LF/Driver high and/or low circuit is short to ground.

B001A 04

The seat belt pretensioner - LF/Driver high and/or low circuit is open.

B001A 0D

The seat belt pretensioner - LF/Driver deployment loop resistance is more than 3.54 ohms.

B001A 0E

The seat belt pretensioner - LF/Driver deployment loop resistance is less than 1.77 ohms.

Action Taken When the DTC Sets

Conditions for Clearing the DTC

Reference Information

Schematic Reference

SIR Schematics

Connector End View Reference

Component Connector End Views

Electrical Information Reference

Circuit/System Testing

Important: When removing connectors inspect for damage or corrosion. Damage or corrosion in the following requires repair or replacement of the affected component/connector.

•	The I/P module

•	The SDM module

•	The I/P wiring harness connector

•	The SDM wiring harness connector

1. Ignition OFF, disconnect the seat belt pretensioner - LF/Driver in-line connector.
2. Disconnect the SDM connector. Refer to SDM replacement in Repair Instructions for connector location.
3. Test the high and low circuits between the SDM and seat belt pretensioner - LF/Driver for a short to voltage, short to ground, short between circuits or open/high resistance. Verify that a short to voltage, short to ground, short between circuits or open/high resistance does not exist.

⇒	If any of the above conditions are found make the appropriate repair.

4. If all circuits test normal then replace the SDM.
5. Ignition ON, use a scan tool to observe the SIR DTC display. Verify DTC B001A is set current.

⇒	Replace the seat belt pretensioner - LF/Driver.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.